| A | B |
|---|
| orbit | cavity that contains the eye |
| eyelids | movable skin folds |
| eyelashes | help prevent large particles from entering the eye |
| conjunctiva | mucous membrane that covers the inside of the eyelids and anterior surface of the eye |
| lacrimal apparatus | produces and stores tears |
| extrinsic muscles | move the eye within the socket |
| optic disc | "blind spot" located on the retina |
| cornea | circular clear area |
| middle layer of the eye | choroid |
| cornea | "window of the eye" |
| choroid | contains blood vessels that nourish the eye |
| pupil | circular opening of the eye |
| lens | focuses images on the retina |
| aqueous humor | "watery" humor that bathes the iris, lens and pupil |
| vitreous humor | clear, jellylike fluid that gives eye shape and refracts light |
| innermost layer of the eyeball | retina |
| retina | light rays form images here |
| optic disc | area where optic nerve exits the retina |
| ciliary body | holds the lens in place |
| macula | responsible for sharp, central vision |
| active in dim light | rods |
| rods | do not perceive color |
| active in bright light | cones |
| cones | perceive color |
| sclera | white of the eye |
| outer layer of the eye | sclera |
| iris | colored part of the eye |
